Explanation

• H2 is only a homo atomic [homo: same] molecule.
• Rest three are hetero atomic [hetero: different] molecules).

Explanation

Urea is a non-electrolyte, meaning it does not dissociate into ions in aqueous solution.

It does not conduct electricity.

Explanation

• Felis catus is the scientific name for the domestic cat.
• It belongs to the family Felidae and is a member of the order Carnivora.

Explanation

Centrifugal force is a fictitious force that appears to act on an object moving in a circular path, causing it to move away from the center of the circle.

It is a result of the inertia of the object, which tends to keep it moving in a straight line.

Explanation

• Filtration
• Sedimentation
• Decantation
• Distillation
• Chromatography

Explanation

• The correct statement about the fluid mosaic model of membrane structure is: The more unsaturated the fatty acid, the more fluid nature.
• Unsaturated fatty acids have kinks in their tails that prevent the lipids from packing tightly together, thus increasing membrane fluidity.

Explanation

Steel is an alloy of iron (Fe) and carbon (C), with small amounts of other elements like manganese, chromium, and vanadium.

It's a mixture of two or more elements, where at least one is a metal, making it an alloy.

Explanation

• Butter is a mixture of solid fat particles (solute) dissolved in liquid oil (solvent), making it a solid-liquid solution.
• This type of solution is also known as a sol or a gel.

Explanation

Selenium (Se) is a metalloid, which means it exhibits some properties of metals and some properties of nonmetals.

Metalloids are elements that are intermediate in character between metals and nonmetals.

Explanation

• A ratio is a comparison of two values or quantities, often expressed as a fraction or a decimal.
• It shows the relative size or magnitude of one value compared to another.
• For example: 2:3 or 2/3 is a ratio comparing the value 2 to the value 3.